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To perform flow-related behaviors in darkness,blind cavefish have evolved Lateral Line Systems (LLSs) with constriction canals to enhance hydrodynamic sensing capabilities.Mimicking the design principles,we developed a Canal-type Artificial Lateral Line (CALL) device featuring a biomimetic constriction canal.The hydrodynamic characterization results revealed that the sensitivity of the canal LLS increases with the decrease in the width (from 1 mm to 0.6 mm) and length (from 3 mm to 1 mm) of the constriction canal,which is in accordance with the modeling results of canal mechanics.The CALL device was characterized in Kármán vortex streets generated by a cylinder in a laminar flow.The CALL device was able to identify the diameter of the cylinder,with a mean identification error of approximately 2.5％.It also demonstrated the identification ability of wake width using the CALL device,indicating the potential for application in hydrodynamic perception.